/* =========================================================
   特色棋牌 · 牌桌档案室 · /assets/site.css
   ========================================================= */

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; padding: 0; cursor: pointer; }

a { color: inherit; }

/* ---------- Tokens ---------- */
:root {
  --ink-green: #0B2B24;
  --ink-green-deep: #071D18;
  --felt-teal: #123E3A;
  --bronze: #B9853E;
  --bronze-lit: #D8B06A;
  --warm-white: #F3EBDD;
  --paper-grey: #D8CFBF;
  --vermilion: #B53A2D;
  --ink-black: #121A17;
  --mist-teal: #6F8F86;
  --text-soft: #4A5A54;

  --font-display: "MiSans", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;

  --header-h: 78px;
  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);

  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 28px;
  --r-pill: 999px;

  --ease-soft: cubic-bezier(.22, .61, .36, 1);
  --shadow-1: 0 1px 0 rgba(185, 133, 62, .30), 0 18px 34px -28px rgba(7, 29, 24, .9);
}

/* ---------- Base typography ---------- */
html { scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-black);
  background-color: var(--warm-white);
  background-image:
    radial-gradient(70% 50% at 8% 4%, rgba(185, 133, 62, .08), transparent 62%),
    radial-gradient(60% 46% at 94% 96%, rgba(18, 62, 58, .10), transparent 64%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: .02em;
  color: var(--ink-black);
}

h1 { font-size: clamp(32px, 4.4vw, 58px); }
h2 { font-size: clamp(25px, 3vw, 38px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
h4 { font-size: 18px; }

p { max-width: 38em; }

strong { font-weight: 700; }

::selection {
  background: var(--bronze-lit);
  color: var(--ink-green);
}

/* ---------- Layout utilities ---------- */
.wrap {
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}

#main-content { padding-top: var(--header-h); }

.bleed-top {
  margin-top: calc(var(--header-h) * -1);
  padding-top: calc(var(--header-h) + clamp(28px, 6vw, 72px));
}

.section { padding-block: clamp(40px, 6vw, 88px); }

.section--dark {
  background: var(--felt-teal);
  color: var(--warm-white);
  border-radius: clamp(20px, 3vw, 36px);
}

.section--dark h2,
.section--dark h3 { color: var(--warm-white); }

.prose { max-width: 36em; }

.lede {
  font-size: clamp(16px, 1.5vw, 18.5px);
  line-height: 1.9;
  color: var(--text-soft);
  max-width: 36em;
}

.mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  font-variant-numeric: tabular-nums;
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--bronze), rgba(185, 133, 62, 0));
}

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--duo { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ---------- Title treatment ---------- */
.title-cut {
  position: relative;
  display: inline-block;
  padding-inline-start: 14px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.vnote {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .34em;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1;
  color: var(--bronze);
  white-space: nowrap;
}

/* ---------- Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 300;
  padding: 10px 22px;
  border-radius: var(--r-pill);
  background: var(--bronze-lit);
  color: var(--ink-green);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .06em;
  text-decoration: none;
  transform: translate(-50%, -180%);
  transition: transform 200ms var(--ease-soft);
}

.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 120;
  color: var(--warm-white);
  background-color: transparent;
  background-image: linear-gradient(180deg, rgba(7, 29, 24, .82) 0%, rgba(7, 29, 24, .36) 64%, rgba(7, 29, 24, 0) 100%);
  transition: background-color 220ms var(--ease-soft), box-shadow 220ms var(--ease-soft);
}

.site-header[data-scrolled="true"] {
  background-color: var(--ink-green);
  background-image: linear-gradient(180deg, rgba(11, 43, 36, 1), rgba(11, 43, 36, 1));
  box-shadow: 0 1px 0 rgba(185, 133, 62, .42), 0 18px 34px -26px rgba(0, 0, 0, .95);
}

.header-inner {
  position: relative;
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 20px);
  padding-block: 10px;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: inherit;
}

.brand__seal {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  color: var(--ink-green);
  background: linear-gradient(150deg, var(--bronze-lit), var(--bronze));
  box-shadow: inset 0 0 0 1px rgba(243, 235, 221, .38);
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 11px 100%, 0 calc(100% - 11px));
  transition: transform 200ms var(--ease-soft);
}

.brand:hover .brand__seal { transform: translateY(-1px) rotate(-2deg); }

.brand__stack {
  display: flex;
  flex-direction: column;
  line-height: 1.14;
  gap: 2px;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: .06em;
  color: var(--warm-white);
}

.brand__sub {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--bronze-lit);
}

/* Panel entry pills */
.panel-entry {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 6px 14px 6px 6px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(185, 133, 62, .58);
  background: rgba(18, 62, 58, .55);
  color: var(--warm-white);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-decoration: none;
  transition: border-color 200ms var(--ease-soft), background-color 200ms var(--ease-soft), transform 200ms var(--ease-soft);
}

.panel-entry:hover {
  border-color: var(--bronze-lit);
  background: rgba(18, 62, 58, .92);
  transform: translateY(-1px);
}

.panel-entry__tag {
  flex: 0 0 auto;
  padding: 2px 8px;
  border-radius: 7px;
  background: var(--bronze);
  color: var(--ink-green);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
}

.panel-entry__label { white-space: nowrap; }

/* Nav */
.site-nav { margin-inline: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0px, .7vw, 10px);
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: rgba(243, 235, 221, .84);
  text-decoration: none;
  transition: color 180ms var(--ease-soft), background-color 180ms var(--ease-soft);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 0;
  height: 1px;
  background: var(--bronze-lit);
  transform: translateX(-50%);
  transition: width 220ms var(--ease-soft);
}

.site-nav__link:hover {
  color: var(--warm-white);
  background-color: rgba(216, 176, 106, .12);
}

.site-nav__link:hover::after { width: 22px; }

.site-nav__link[aria-current="page"] {
  color: var(--ink-green);
  background-color: var(--bronze-lit);
}

.site-nav__link[aria-current="page"]::after { display: none; }

/* Header tail */
.header-tail {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* Nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(216, 176, 106, .5);
  background: transparent;
  color: var(--warm-white);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  transition: border-color 200ms var(--ease-soft), background-color 200ms var(--ease-soft);
}

.nav-toggle:hover { border-color: var(--bronze-lit); background: rgba(216, 176, 106, .12); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 220ms var(--ease-soft), opacity 160ms var(--ease-soft);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* Scroll meter */
.scroll-meter {
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: rgba(216, 176, 106, .14);
  pointer-events: none;
}

.scroll-meter__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--bronze), var(--bronze-lit));
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .72em 1.5em;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 200ms var(--ease-soft), color 200ms var(--ease-soft),
              border-color 200ms var(--ease-soft), transform 200ms var(--ease-soft);
}

.btn:hover { transform: translateY(-1px); }

.btn--solid {
  background: var(--bronze-lit);
  color: var(--ink-green);
  border-color: var(--bronze-lit);
}

.btn--solid:hover { background: var(--bronze); border-color: var(--bronze); }

.btn--line {
  background: transparent;
  color: var(--bronze-lit);
  border-color: var(--bronze);
}

.btn--line:hover { background: rgba(216, 176, 106, .14); border-color: var(--bronze-lit); }

.btn--quiet {
  background: rgba(11, 43, 36, .06);
  color: var(--ink-green);
  border-color: var(--paper-grey);
}

.btn--quiet:hover { background: rgba(11, 43, 36, .12); border-color: var(--bronze); }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist-teal);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li { display: inline-flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--bronze);
  opacity: .8;
}

.breadcrumb a {
  color: var(--felt-teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease-soft), border-color 180ms var(--ease-soft);
}

.breadcrumb a:hover { color: var(--bronze); border-bottom-color: var(--bronze); }

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--bronze);
  color: var(--bronze);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  white-space: nowrap;
}

.tag--solid {
  background: var(--bronze);
  border-color: var(--bronze);
  color: var(--ink-green);
}

.tag--alert {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

/* ---------- Media frame ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-lg);
  background-color: var(--felt-teal);
  background-image:
    radial-gradient(80% 70% at 24% 18%, rgba(216, 176, 106, .22), transparent 62%),
    radial-gradient(70% 60% at 82% 88%, rgba(11, 43, 36, .75), transparent 66%);
  box-shadow: inset 0 0 0 1px rgba(185, 133, 62, .4);
  aspect-ratio: 4 / 3;
  isolation: isolate;
}

.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist-teal);
}

/* ---------- TOC ---------- */
.toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc__link {
  display: block;
  padding: 8px 12px;
  border-left: 2px solid var(--paper-grey);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--mist-teal);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-decoration: none;
  transition: color 180ms var(--ease-soft), border-color 180ms var(--ease-soft), background-color 180ms var(--ease-soft);
}

.toc__link:hover { color: var(--ink-green); border-left-color: var(--bronze); }

.toc__link.is-active {
  color: var(--ink-green);
  border-left-color: var(--bronze);
  background: rgba(185, 133, 62, .14);
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 100px);
  padding-top: clamp(40px, 6vw, 76px);
  border-radius: clamp(28px, 5vw, 64px) clamp(28px, 5vw, 64px) 0 0;
  background: var(--ink-green);
  color: rgba(243, 235, 221, .82);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 6% 0%, rgba(18, 62, 58, .95), transparent 62%),
    radial-gradient(100% 70% at 94% 100%, rgba(185, 133, 62, .18), transparent 64%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: min(560px, 74%);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--bronze), transparent);
}

.footer-inner {
  position: relative;
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(240px, 1.1fr) minmax(260px, 1.35fr) minmax(220px, .95fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.footer-brand__mark {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: .1em;
  color: var(--warm-white);
  text-decoration: none;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(185, 133, 62, .55);
  transition: color 200ms var(--ease-soft), border-color 200ms var(--ease-soft);
}

.footer-brand__mark:hover { color: var(--bronze-lit); border-bottom-color: var(--bronze-lit); }

.footer-brand__sum {
  margin-top: 14px;
  max-width: 22em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist-teal);
}

.footer-brand__cta { margin-top: 20px; }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 34px);
}

.footer-col__title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--bronze);
  margin-bottom: 14px;
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-col__list a {
  display: inline-block;
  padding: 5px 0;
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .05em;
  color: rgba(243, 235, 221, .76);
  text-decoration: none;
  transition: color 180ms var(--ease-soft), transform 180ms var(--ease-soft);
}

.footer-col__list a:hover {
  color: var(--bronze-lit);
  transform: translateX(3px);
}

.footer-contact__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
}

.footer-contact__k {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--bronze);
}

.footer-contact__v {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .03em;
  color: rgba(243, 235, 221, .86);
  word-break: break-word;
}

.footer-note {
  margin-top: 16px;
  max-width: 26em;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist-teal);
}

.footer-base {
  position: relative;
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin: clamp(28px, 4vw, 48px) auto 0;
  padding: 18px 0 28px;
  border-top: 1px solid rgba(185, 133, 62, .28);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist-teal);
}

.footer-base__copy,
.footer-base__icp,
.footer-base__note { max-width: none; }

.footer-base__icp { color: rgba(216, 176, 106, .85); }

/* ---------- Focus & motion ---------- */
:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 3px;
}

.site-header :focus-visible,
.site-footer :focus-visible,
.section--dark :focus-visible {
  outline-color: var(--bronze-lit);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .site-header {
    background-color: rgba(11, 43, 36, .97);
    background-image: none;
  }

  .site-header[data-scrolled="true"] { background-color: var(--ink-green); }

  .panel-entry--desktop { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    background: var(--ink-green);
    border-top: 1px solid rgba(185, 133, 62, .3);
    box-shadow: 0 28px 44px -30px #000;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height 260ms var(--ease-soft), opacity 200ms var(--ease-soft);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px var(--gutter) 20px;
  }

  .site-nav__link {
    display: block;
    padding: 12px 14px;
    border-radius: var(--r-sm);
    font-size: 15px;
  }

  .site-nav__link::after { display: none; }

  .site-header[data-open="true"] .site-nav {
    max-height: 78vh;
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
  }
}

@media (max-width: 960px) {
  .footer-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .grid--split,
  .grid--duo { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  :root { --header-h: 64px; }

  body { font-size: 16px; }

  .brand__seal { width: 34px; height: 34px; font-size: 17px; }
  .brand__name { font-size: 15.5px; }
  .brand__sub { font-size: 10px; letter-spacing: .2em; }

  .panel-entry { padding: 4px 11px 4px 4px; font-size: 12.5px; }
  .panel-entry__tag { font-size: 10px; padding: 2px 6px; }

  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 6px; }
}

@media (max-width: 480px) {
  .nav-toggle__text { display: none; }
  .nav-toggle { padding: 8px 11px; }
  .panel-entry--mobile .panel-entry__label { font-size: 12px; }
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
}